According to character selection dyes fibers because of their different nature, when adapted to the need to use dyes. When such as dyeing, because of its molecular structure contains many hydrophilic hydroxyl, easy to absorb moisture expansion, can react with the reactive group, and alkali-resistant, so you can choose directly, reducing, sulfide, icing dyes and reactive dyes. Polyester high hydrophobicity, not alkali-resistant at high temperatures, generally should not be used more than dyes, dyed with disperse dyes should be selected. According to uses select dyes due to pollutants for different purposes, so the fastness of dyed product is also different. Wash cloth such as curtain is not usually, but constant exposure to sunlight, dyed, you should choose higher light fastness dye